I guess your idea works if there is a Scope Box applied to the source view. My post was about applying the extents of a Scope Box (the 3D box, usually green lines) to a Section Box (the cropping extents of a specific 3D view).

I know this is an old post but I thought I'd mention that there was in fact a bug in the code presented in the original post on the building coder blog. It wasn't your 'less-than-optimal API skills' after all! I had trouble getting that solution to work too until I realized the mistake in it. Basically, the max bounds of the bounding box created from the scope box need to be specified in the coordinate space of the bounding box rather than in world coordinate space. Taking the length of each vector obtained from the dimensions of the scope… Read more »